JP3131565B2 - Motor actuator and method of manufacturing the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor actuator and a method of manufacturing the same, and more particularly, to a motor actuator and a method of manufacturing the same that make it difficult to transmit vibration from a motor.

[0002]

BACKGROUND OF THE INVENTION As a motor actuator, there is known a motor actuator in which a motor and a conductive plate are housed in a housing as described in, for example, JP-A-3-183338. However, those described in this publication require soldering and are not suitable for automatic assembly.

Further, Japanese Utility Model Application Laid-Open No. 2-146966 discloses a structure in which a motor terminal and a connection piece as a power supply terminal for the motor are sandwiched between upper and lower housings to achieve electrical connection. According to this configuration, the assembling can be automated, but the vibration of the brush generated by the contact between the brush and the commutator inside the motor is transmitted to the motor terminal integrated with the brush. Directly transmitted to the housing, this is a noise problem.

[0004] Alternatively, a configuration is conceivable in which a clip portion is formed on a plate raised from the housing, and a motor terminal is sandwiched between the clip portions. However, in this configuration, the plate may resonate due to the vibration of the motor terminal and amplify the vibration of the motor terminal. Therefore, the plate can be pressed down with rubber, but the number of parts increases and the cost increases.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in consideration of the above problems. Accordingly, it is possible to prevent a vibration from being transmitted from a motor via a power supply terminal without increasing the number of parts, and to provide a motor actuator which can be automatically assembled. It is an object of the present invention to provide a manufacturing method thereof.

[0006]

According to one aspect of the present invention, a motor having a power supply terminal is mounted on a housing, a fixing portion for fixing the housing to the housing, and the terminal. A clip portion that electrically connects the clip portion, a conduction portion that conducts from the clip portion to the power supply side, a temporary connection portion between the fixing portion and the clip portion,
Attaching a conductive unit integrally having to the housing, connecting the terminal of the motor and a clip portion of the conductive unit, and after completing all the steps, at least the Cutting off and removing a part thereof, wherein the conducting portion is formed so as to bypass the fixing portion to the clip portion.

According to the present invention, the motor and the conduction portion are electrically connected by the clip portion sandwiching the terminal. Therefore, since soldering can be omitted, automation of assembling is easy. In addition, since the vibration from the motor is absorbed in the conduction portion, noise due to the vibration can be prevented.

Further, since a temporary connecting portion is provided between the fixing portion and the clip in addition to the conducting portion, it is easy to connect the terminal of the motor and the clip portion.

According to a second aspect of the present invention, in the method for manufacturing a motor actuator according to the first aspect, after the conductive unit is mounted on the housing, the temporary connecting portion is elastically deformed to mount the motor, and the motor is mounted by stress. The terminal of the motor is inserted into the clip portion while returning to the original position of the temporary connection portion.

According to the present invention, the connection between the clip portion and the terminal can be performed only by returning the temporary connection portion when the motor is attached, by performing a process such as bending the temporary connection portion.

According to a third aspect of the present invention, there is provided a motor actuator having a housing, a motor having a terminal, and a conductive unit for supplying power to the terminal, wherein the conductive unit comprises: A clip portion electrically connected to the terminal and a conducting portion conducting from the clip portion to the power supply side, wherein the conducting portion detours from the fixed portion to the clip portion; It is characterized by being formed.

Since the present invention is manufactured by the above-described method, it is possible to prevent transmission of vibration from the motor without increasing the number of parts.

[0013]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 4 is a diagram illustrating the inside of the motor actuator according to the present embodiment.

The motor actuator is mounted on an air conditioner unit of the vehicle, and controls opening and closing of a damper such as an air outlet, temperature control, or switching between inside and outside air via a link mechanism (not shown).

As shown in FIG. 4, the motor actuator comprises a motor 20, reduction gears 12, 14, 16,
And a housing 10 and a cover (not shown) for accommodating them.

The motor 20 is a DC motor. A worm 18 is provided on a rotating shaft 20 a of the motor 20.
The reduction gear 12 becomes a worm wheel, and the reduction gear 12
Is transmitted to the reduction gears 14 and 16, and the reduction gear 16
The rotational force is output from an output shaft 16a provided in the power supply.

In the conductive unit 30, the fixing portion 32 is formed by integrating various conductive members. Here, as a conductive member,
There are terminal pins 34, brushes 36, wiring plates 38, and clip portions 40 (see FIG. 3). The fixing part 32
The conductive member is integrated with a resin and fixed to the housing 10. The clip portion 40 is integrated with the wiring plate 38 so as to be integrated with another conductive member.

The terminal pins 34 constitute connector pins and are connected to a power supply or the like. The brush 36 slides on a pattern substrate (not shown) formed on the back surface of the reduction gear 16, and This is for detecting the rotational position of the reduction gear 16.

The present embodiment has features around the wiring plate 38 and the clip portion 40. FIG. 1 shows I-
FIG. 2 is an enlarged view of a part corresponding to a cross section taken along a line I, and FIG.
3 is a partially enlarged view corresponding to a cross section taken along line III-III of FIG.

The wiring plate 38 and the clip portion 40
It is provided in a pair. Then, each wiring plate 38
Is configured integrally with each clip portion 40,
It is electrically connected to any one of the plurality of terminal pins 34 and the brush 36. For this reason, the fixing portion 32
A conductive plate (not shown) for connecting the wiring plate 38 to the terminal pins 34 or the brushes 36 is provided therein.
Is formed. The wiring plate 38
Are formed as thin as a lead wire.
Flexible enough to absorb vibrations from Further, as shown in FIG. 3, the wiring plate 38 is formed by detouring in a rectangular wave shape, and is longer than the linear distance. Therefore, vibration transmitted through the wiring plate 38 can be absorbed at a sufficient distance.

As shown in FIG. 1, the clip portion 40 electrically connects the terminal 22 of the motor 20 with the clip portion 40 interposed therebetween.
The tip is widened to facilitate insertion of the terminal 22.
Therefore, the clip portion 40 can sandwich the terminal 22 only by returning to the original state from the state shown by the two-dot chain line in FIG.

The pair of clip portions 40, 40
They are connected by two. Specifically, the reinforcing portion 42
The connection between the vicinity of the connection between one clip portion 40 and the wiring plate 38 to the other clip portion 40 and the wiring plate 38 is connected. Thereby, the clip portions 40, 40
Are kept constant, and disconnection of the connection between the clip portion 40 and the wiring plate 38 is prevented. The reinforcing portion 42 is made of an insulating resin in order to prevent an electrical short circuit between the clip portions 40, 40.

The reinforcing portion 42 is connected to the fixed portion 32 by a temporary connecting portion 44 as shown by a two-dot chain line in FIG. More specifically, the temporary connecting portion 44 is formed by bending a part of the conductive member in the fixed portion 32 and rising and covering the conductive member with a resin, and a removing portion 44a removed in a manufacturing process.
And Then, the fixing portion 32 and the reinforcing portion 42
And the temporary connection part 44 are connected. This temporary connection part 44
Is removed after the clip portion 40 and the terminal 22 of the motor 20 are connected.

In other words, the structure of the conductive unit 30 before being attached to the housing 10 is such that the fixing portion 32, the temporary connecting portion 44, and the reinforcing portion 42 are connected and integrated, The removing portion 44a of the connecting portion 44 is removed, and the fixing portion 32 and the reinforcing portion 42 are separated.

By doing so, the wiring plate 38 and the clip are provided between the terminal 22 of the motor 20 and the fixed portion 32.
Only the part 40 will be present. This wiring plate 3
8 absorbs the vibration as described above, so that the transmission of the vibration from the terminal 22 to the housing 10 can be reduced.

It is preferable that a cut or the like is formed in the removal portion 44a so that the removal portion 44a is easily cut from the reinforcing portion 42 and the rising portion 44b.

This embodiment is configured as described above, and its manufacturing process will be described below. First, the conductive unit 30 is attached to the housing 10 before assembling the motor 20 and the reduction gears 12, 14, 16. Specifically, the fixing part 32 of the conductive unit 30 is fixed to the housing 10. In this state, in the conductive unit 30, the fixing portion 32, the temporary connecting portion 44, and the reinforcing portion 42 are integrated.

Next, as shown in FIG. 1, the motor 20 is mounted on the housing 10. At this time, the clip portion 40 of the conductive unit 30 is prevented from contacting the terminal 22 of the motor 20. Specifically, the rising portion 4 of the temporary connecting portion 44
4b is temporarily held in a state where it is elastically deformed and bent, and the motor 20 is assembled during that time. When the force on the rising portion 44b is reduced, the rising portion 44b naturally returns to the original state, and the terminal 22 is inserted into the clip portion 40. Thus, the electrical connection between the clip portion 40 and the terminal 22 is completed with one touch.

Subsequently, as shown in FIGS. 1 and 3, the removing portion 44a of the temporary connecting portion 44 is cut and separated. Thereafter, the reduction gears 12, 14, 16 are assembled.

According to the motor actuator manufactured by the above steps, the terminal 22 of the motor 20 and the fixed portion 32
Are connected only by the wiring plate 38 and the clip portion 40 . The wiring plate 38 is so thin and flexible that it can absorb the vibration, so that the vibration is not transmitted from the motor 20 through the terminal 22. Therefore, noise can be reduced. Further, in the above manufacturing method, since the soldering can be omitted, the automation of the assembling is easy.

According to experiments performed by the inventors of the present invention, the motor actuator to which the present invention is applied has low noise almost in the same manner as a conventional product in which vibration is suppressed by a rubber bush, and particularly in a high frequency range (8 to 20 kHz). , Better than conventional products.

[0032]

[Brief description of the drawings]

FIG. 1 is a partially enlarged view corresponding to a cross section taken along line II of FIG. 4;

FIG. 2 is a partially enlarged view of FIG.

FIG. 3 is a partially enlarged view corresponding to a cross section taken along line III-III of FIG. 4;

FIG. 4 is a diagram showing the inside of a motor actuator according to the present embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 20 Motor 22 Terminal 30 Conductive unit 32 Fixed part 38 Wiring plate (conductive part) 40 Clip part 44 Temporary connection part

Continued on the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02K 15/14 H02K 5/22 H02K 5/24

Claims (3)

(57) [Claims] 1. A step of attaching a motor having a power supply terminal to a housing, a fixing part to the housing, a clip part electrically connecting the terminal to the terminal, and conduction from the clip part to a power supply side. A step of attaching a conductive unit integrally having a conducting portion to be performed and a temporary connection portion between the fixing portion and the clip portion to the housing; and a terminal of the motor; and a clip portion of the conductive unit. And a step of cutting and removing at least a part of the temporary connection portion after completion of all the steps, wherein the conduction portion bypasses the fixing portion to the clip portion. A method for manufacturing a motor actuator characterized by being formed by: 2. The method according to claim 1, wherein the conductive unit is attached to the housing.
Attach the motor by elastically deforming the temporary connection portion,
A method of manufacturing a motor actuator, comprising inserting a terminal of the motor into the clip portion while returning the temporary connection portion to an original position by a stress. 3. A motor having a housing and a terminal,
In the motor actuator having a conductive unit for supplying power to the terminal, the conductive unit includes a fixed portion of said housing, guide
And a conductive member, wherein the conductive member is made of a conductive plate provided on the fixing portion.
A conductive part formed by lifting up, and an integral part with the conductive part.
And a clip portion sandwiching the terminal, wherein the conducting portion and the terminal are provided between the fixed portion and the terminal.
Only the clip portion is present, and the conducting portion is of such an extent that it absorbs vibration caused by the motor.
It has flexibility and motor actuator, characterized in that it is made form <br/> bent to bypass to be longer than a linear distance from the fixed portion to the clip portion.